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  1. SAFe Program
  2. SP-2393

Assessment of work required to implement MGP weighting

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    • Must have
    • PI14
    • None
    • None
    • Obs Mgt & Controls
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      • The feasibility and scope of work required to implement MGP weighting (inline with other weighting schemes) is known, allowing the timing of the initial Mid-SC release to be placed in the Roadmap.
      • Discussion with RASCIL developers to implement MGP weighting in the code base is instigated.
      Show
      The feasibility and scope of work required to implement MGP weighting (inline with other weighting schemes) is known, allowing the timing of the initial Mid-SC release to be placed in the Roadmap. Discussion with RASCIL developers to implement MGP weighting in the code base is instigated.
    • Hide
      • The RASCIL developers are aware of the request for new functionality and have provided an estimated timescale if they are willing. 
      • If RASCIL cannot commit to such development, a plan to investigate an alternate implementation of the MGP algorithm is developed.
      • The scope (in terms of FPs) is estimated for implementing MGP in the Sensitivity Calculator.
      Show
      The RASCIL developers are aware of the request for new functionality and have provided an estimated timescale if they are willing.  If RASCIL cannot commit to such development, a plan to investigate an alternate implementation of the MGP algorithm is developed. The scope (in terms of FPs) is estimated for implementing MGP in the Sensitivity Calculator.
    • 2
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    • 20
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    • Team_BUTTONS
    • Sprint 5
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      • We discussed the request with ORCA and they have confirmed that they will be able to add the Miriad 'radfft' functionality to RASCIL towards the beginning of PI15.
      • The Sensitivity Calculator is going to need the creation of look-up tables using the improved RASCIL that use tapering to produce a range of acceptable synthesized beams with reasonable noise properties.
      • The synthesized beam should be reported along with the associated surface brightness sensitivity.
      • We estimate 2 FPs for the Buttons work.
      • A bug in RASCIL is currently preventing its use for generating the look-up tables. This is being actively worked on, but when this will be fixed by is unclear. CASA may offer an alternative to RASCIL although it probably does not include a feature equivalent to 'radftt'.
      Show
      We discussed the request with ORCA and they have confirmed that they will be able to add the Miriad 'radfft' functionality to RASCIL towards the beginning of PI15. The Sensitivity Calculator is going to need the creation of look-up tables using the improved RASCIL that use tapering to produce a range of acceptable synthesized beams with reasonable noise properties. The synthesized beam should be reported along with the associated surface brightness sensitivity. We estimate 2 FPs for the Buttons work. A bug in RASCIL is currently preventing its use for generating the look-up tables. This is being actively worked on, but when this will be fixed by is unclear. CASA may offer an alternative to RASCIL although it probably does not include a feature equivalent to 'radftt'.
    • 14.6
    • Stories Completed, Outcomes Reviewed, Satisfies Acceptance Criteria, Accepted by FO

    Description

      A spike to investigate the work required to implement “most Gaussian possible” (MGP) weighting within the Sensitivity Calculator. The implementation will be in line with the look-up tables, already contained within the Sensitivity Calculator. 

      This spike includes discussion with RASCIL developers to request that the 'radfft' function is enabled in their software. This is an additional weighting step required when the u,v coverage is sparse and is described in Robert Braun's memo on MGP weighting: https://docs.google.com/document/d/1EVxo0y8bMmiwj2ps57i4abEQqK9XpgxljPwT-_5JtTs/edit (access required).

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          Feature - A Feature is a service that fulfills a stakeholder need. Each feature includes a benefit hypothesis and acceptance criteria, and is sized or split as necessary to be delivered by a single Agile Release Train (ART) in a Program Increment (PI). SP-2394 Implement MGP weighting in Sensitivity Calculator

          • Should have - Items labelled as "Should have" are important but not necessary for delivery in the current delivery timebox. While "Should have" items can be as important as "Must have", they are often not as time-critical or there may be another way to satisfy the requirement so that it can be held back until a future delivery timebox.
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                r.braun Braun, Robert
                Adam.Avison Avison, Adam
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                Feature Progress

                  Story Point Burn-up: (100.00%)

                  Feature Estimate: 2.0

                  IssuesStory Points
                  To Do00.0
                  In Progress   00.0
                  Complete11.0
                  Total11.0

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